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Operation systems

Jérôme Dubar

Useful Linux commands for an Oracle DBA

By | Database Administration & Monitoring, Operation systems, Oracle | 2 Comments

Introduction Oracle & Linux is a great duet. Very powerfull, very scriptable. Here are several commands that make my life easier. These tools seems to be widespread on most of the Linux distributions. watch with diff It’s my favorite tool since a long time. watch can repeat a command indefinitely until you stop it with Ctrl+C. And it’s even more useful with the – -diff parameter. All the differences since last run are highlighted. For…

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Jérôme Dubar

Patching or reimaging your ODA?

By | Database Administration & Monitoring, Hardware & Storage, Operation systems, Oracle | No Comments

Introduction One of the key features of the ODA (Oracle Database Appliance) is the ability to patch the entire stack every three months, the goal being to keep all the components up-to-date. Most of the customers won’t patch so often, but one patch a year is quite a good average. But when comes the time for patching, comes the time for anxiety for the DBA. And it’s totally justified. Why ODA patching can eventually be…

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Cesare Cervini

How to stop Documentum processes in a docker container, and more (part I)

By | Application integration & Middleware, Entreprise content management, Operation systems | No Comments

How to stop Documentum processes in a docker container, and more Ideally, but not mandatorily, the management of Documentum processes is performed at the service level, e.g. by systemd. In my blog here, I showed how to configure init files for Documentum under systemd. But containers don’t have systemd, yet. They just run processes, often only one, sometimes more if they are closely related together (e.g. the docbroker, the method server and the content servers),…

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Oracle Team

Cause for looping sssd

By | Operation systems | No Comments

In RedHat Enterprise Linux 7, the sssd daemons can connect to active directory servers. Default behaviour is to update DNS entries dynamically. If a statical DNS entry already exists this can lead to a CPU consuming sssd_nss daemon. To prevent this behaviour, the dynamic DNS updates should be switched off with this setting in every doman section of config file /etc/sssd/sssd.conf: dyndns_update = False After that sssd should be restarted to take this change effect.

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Joël Cattin

Red Hat Enterprise Linux 8 – Application Streams

By | Operation systems | No Comments

You may have heard that : Red Hat Enterprise Linux 8 is available for downloading in beta version since few weeks… You want to download it ? Click here. A significant change coming with this new version is the way the applications packages are provided. As you know, up to RHEL7 packages were downloaded via repositories listed in .repo files located by default under /etc/yum.repos.d/. This is still the same with RHEL8, but two new…

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Mouhamadou Diaw

Monitoring Linux With Nmon

By | Hardware & Storage, Operation systems | One Comment

I was looking for tools to monitor linux servers and I found an interesting one nmon ( short for Nigel’s Monitor). I did some tests. In this blog I am describing how to install nmon and how we can use it I am using a Oracle Enterprise Linux System. [[email protected] nmon]# cat /etc/issue Oracle Linux Server release 6.8 Kernel \r on an \m [[email protected] nmon]# For the installation I used the repository epel wget http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm…

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